Click on the app that looks like this
When you open the app this page should show up on your screen
When you open the app this page will show up
When you click on create project click on trailer
When you click on that you can have all different theme's
When you click create this should show up and you can edit who it was written by name ,logo style, costume,music and more!
If you need help you can click the question mark in the top right corner